Invoice Manager simplifies invoice management process by allowing users to input invoice details, upload supporting documents, and manage approvals. It features collaboration tools for discussions and reviews, with full access to the conversation history. Automated workflows ensure approvals follow predefined rules, while users can track, search, filter, and export invoice data to Excel or CSV. Additionally, built-in reporting capabilities provide insights into invoice statuses and approvals. External stakeholders can also access the system to review and approve invoices, making the process more efficient.